Apparatus

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sensors Mode-S transponder

31E08F

ICAO 24-bit transponder address · allocated to Italy

Currently assigned to I-E637 · SWISS EXCELLENCE Risen

Hex
31E08F
Octal
14360217
Decimal
3,268,751
Country
IT
Tail
I-E637
Type
RISN
No current signal · last broadcast 18h ago
Flights observed
48
Distinct callsigns
1
Country
IT
Last broadcast
18h ago

Last known position

Most recent position reported by Mode-S 31E08F.

Country allocation

The ICAO 24-bit address 31E08F falls within the block assigned to Italy (IT) by ICAO Annex 10, Volume III. Every aircraft registered in Italy receives a permanent address from this block at the time of registration; the address stays with the airframe even if the aircraft is re-registered to a different operator within the country.

Callsign history 1 distinct

Callsign Airline Flights Last seen
IE637 - 48 2026-06-16

Recent flights last 48

DateFlightRouteTakeoffLandingDuration
2026-06-16 IE637 - Jun 16, 05:15 UTCJun 16, 05:34 UTC20m
2026-06-15 IE637 - Jun 15, 09:35 UTCJun 15, 10:05 UTC30m
2026-06-14 IE637 - Jun 14, 12:05 UTCJun 14, 15:20 UTC3h 15m
2026-06-14 IE637 - Jun 14, 08:05 UTCJun 14, 09:25 UTC1h 20m
2026-06-14 IE637 - Jun 14, 02:15 UTCJun 14, 03:50 UTC1h 35m
2026-06-13 IE637 - Jun 13, 16:00 UTCJun 13, 16:15 UTC15m
2026-06-13 IE637 - Jun 13, 14:05 UTCJun 13, 15:05 UTC1h 0m
2026-06-13 IE637 - Jun 13, 11:45 UTCJun 13, 13:30 UTC1h 45m
2026-06-13 IE637 - Jun 13, 10:20 UTCJun 13, 11:10 UTC50m
2026-06-13 IE637 - Jun 13, 05:05 UTCJun 13, 09:10 UTC4h 5m
2026-06-12 IE637 - Jun 12, 15:30 UTCJun 12, 16:00 UTC30m
2026-06-08 IE637 - Jun 8, 15:40 UTCJun 8, 16:15 UTC35m
2026-06-07 IE637 - Jun 7, 09:05 UTCJun 7, 14:25 UTC5h 20m
2026-06-07 IE637 - Jun 7, 07:55 UTCJun 7, 08:20 UTC25m
2026-06-07 IE637 - Jun 7, 06:05 UTCJun 7, 07:00 UTC55m
2026-06-06 IE637 - Jun 6, 14:25 UTCJun 6, 15:30 UTC1h 5m
2026-06-05 IE637 - Jun 5, 15:35 UTCJun 5, 18:10 UTC2h 35m
2026-06-05 IE637 - Jun 5, 10:20 UTCJun 5, 13:20 UTC3h 0m
2026-06-05 IE637 - Jun 5, 06:30 UTCJun 5, 08:35 UTC2h 5m
2026-06-02 IE637 - Jun 2, 12:25 UTCJun 2, 14:00 UTC1h 35m
2026-06-02 IE637 - Jun 2, 09:35 UTCJun 2, 11:40 UTC2h 5m
2026-05-31 IE637 - May 31, 10:55 UTCMay 31, 11:20 UTC25m
2026-05-29 IE637 - May 29, 06:50 UTCMay 29, 09:20 UTC2h 30m
2026-05-28 IE637 - May 28, 15:15 UTCMay 28, 15:35 UTC20m
2026-05-28 IE637 - May 28, 12:50 UTCMay 28, 13:10 UTC20m
2026-05-28 IE637 - May 28, 10:05 UTCMay 28, 10:35 UTC30m
2026-05-24 IE637 - May 24, 10:45 UTCMay 24, 11:20 UTC35m
2026-05-23 IE637 - May 23, 15:55 UTCMay 23, 16:15 UTC20m
2026-05-23 IE637 - May 23, 15:25 UTCMay 23, 15:50 UTC25m
2026-05-23 IE637 - May 23, 13:40 UTCMay 23, 14:40 UTC1h 0m
2026-05-22 IE637 - May 22, 14:00 UTCMay 22, 15:20 UTC1h 20m
2026-05-22 IE637 - May 22, 08:30 UTCMay 22, 08:50 UTC20m
2026-05-21 IE637 - May 21, 13:40 UTCMay 21, 15:10 UTC1h 30m
2026-05-21 IE637 - May 21, 07:05 UTCMay 21, 08:30 UTC1h 25m
2026-05-20 IE637 - May 20, 07:00 UTCMay 20, 07:40 UTC40m
2026-05-15 IE637 - May 15, 14:05 UTCMay 15, 14:40 UTC35m
2026-05-15 IE637 - May 15, 13:10 UTCMay 15, 13:25 UTC15m
2026-05-15 IE637 - May 15, 12:10 UTCMay 15, 12:25 UTC15m
2026-05-13 IE637 - May 13, 10:00 UTCMay 13, 10:55 UTC55m
2026-05-09 IE637 - May 9, 06:55 UTCMay 9, 07:25 UTC30m
2026-05-08 IE637 - May 8, 13:40 UTCMay 8, 13:55 UTC15m
2026-05-08 IE637 - May 8, 13:15 UTCMay 8, 13:35 UTC20m
2026-05-08 IE637 - May 8, 12:20 UTCMay 8, 12:39 UTC20m
2026-05-08 IE637 - May 8, 10:04 UTCMay 8, 10:29 UTC25m
2026-05-05 IE637 - May 5, 16:25 UTCMay 5, 16:55 UTC30m
2026-04-26 IE637 - Apr 26, 07:55 UTCApr 26, 09:05 UTC1h 10m
2026-04-20 IE637 - Apr 20, 06:40 UTCApr 20, 07:55 UTC1h 15m
2026-04-14 IE637 - Apr 14, 15:30 UTCApr 14, 16:05 UTC35m

About Mode-S

A Mode-S transponder code (also called an "ICAO 24-bit address" or "hex code") is a 6-character hexadecimal identifier permanently assigned to an aircraft when it's first registered. Unlike callsigns (which change with each flight) or registrations (which can change if an aircraft is sold internationally), the Mode-S address stays with the airframe for the life of the aircraft in that country.

Every ADS-B transmission from an aircraft includes its Mode-S address, making it the most reliable way to identify a specific airframe. Flight-tracking services like Apparatus use the Mode-S address as the primary key for tying position broadcasts, callsigns, and ownership records together.

Prefer a tail-number view? See the I-E637 page for operator, model, and routing details .

Mode-S 31E08F frequently asked

What is Mode-S code 31E08F?
31E08F is an ICAO 24-bit transponder address. Allocated to Italy. Assigned to I-E637.
Where is Mode-S 31E08F registered?
Mode-S code 31E08F is allocated to Italy (IT). All aircraft registered there receive a Mode-S address from a fixed block defined by ICAO Annex 10.
Is 31E08F broadcasting right now?
No active broadcast right now. Last signal was 18h ago.
Hex, octal, and decimal Mode-S codes: what's the difference?
The same 24-bit identifier expressed in different bases: hex 31E08F, octal 14360217, decimal 3,268,751.
What flights does 31E08F operate?
Mode-S 31E08F has broadcast 1 distinct callsign, including IE637.